FR3067011B1 - TIP AND DEVICE FOR DISPENSING LIQUID COMPRISING A CAP - Google Patents

Abstract

The invention relates to a nozzle (10) for dispensing liquid comprising: - a liquid dispensing opening, - a removable cap for covering said opening, - a residual liquid evaporation path disposed between the opening and the outside the nozzle (10) when the removable cap is mounted on the nozzle (10), - a shutter means (100) of the evaporation path, movable in the cap between a closed position and a position opening of the evaporation path, the cap comprising an outer casing and an inner casing (44) coaxial, mounted movable relative to each other in an axial direction (A) of the endpiece (10) between: - a configuration before first use, called storage configuration; a configuration of unscrewing the cap when a pressing force exerted on the cap has an intensity greater than a predetermined threshold; - A safety configuration when a pressing force exerted on the cap has an intensity lower than the predetermined threshold or when no pressing force is exerted on the cap, - the shutter means (100) being configured to be driven by the movement of the outer casing to move from the closed position to the open position.

Description

Nozzle and liquid dispensing device comprising a cap

The present invention relates to the technical field of liquid distribution. In particular, but not exclusively, it relates to the field of liquid distribution in the form of drops or in the form of a spray, such as ophthalmic, nasal, oral or auricular fluid.

It has already been proposed in WO2013 / 140069, a liquid dispensing device comprising a reservoir and a dispensing tip provided with a removable cap. The cap described in this document comprises two envelopes movable relative to each other so as to create an air passage for the evaporation of residual liquid at the dispensing orifice. It happens that this cap opens by simply unscrewing, so that the liquid product in the reservoir becomes easily accessible via the dispensing tip. This presents a danger for a toddler who can, by manipulating the device, succeed in opening the cap and have access to the liquid product that can cause poisoning. The object of the invention is in particular to remedy these drawbacks by providing a nozzle and a liquid distribution device whose safety is improved. For this purpose, the object of the invention is a liquid dispensing nozzle comprising: a liquid dispensing opening, a removable cap intended to cover said opening when it is mounted on the mouthpiece, a path for dispensing liquid; evaporation of residual liquid disposed between the opening and the outside of the nozzle when the removable cap is mounted on the nozzle, - a means for closing the evaporation path, movable in the cap between a closed position and an open position of the evaporation path, the cap comprising an outer casing and a coaxial inner casing, mounted movable relative to each other in an axial direction (A) of the endpiece between: a configuration before first use, said storage configuration, wherein the shutter means is in the closed position; . a cap unscrewing configuration when a bearing force exerted on the cap has an intensity greater than a predetermined threshold, wherein a rotation in a first direction of the outer casing causes a rotation of the inner casing in the same first direction, so that the cap can be unscrewed; . a safety configuration when a pressing force exerted on the cap has an intensity lower than the predetermined threshold or when no pressing force is exerted on the cap, in which the outer casing is configured to turn on a wheel free with respect to the inner casing in the first direction, the security configuration further corresponding to a configuration in which the shutter means is in the open position, - the shutter means being configured to be driven by the relative movement between the outer shell and the remainder of the nozzle to move from the closed position to the open position.

Thus, there is provided a nozzle in which the outer casing and the inner casing can advantageously take a configuration allowing air to pass between them, while offering improved security. Indeed, a sufficiently large bearing force is required on the outer casing to unscrew the cap. The unscrewing remains simple and intuitive for an adult while a child, who is not able to turn by pressing or pressing hard enough on the outer shell, will be only in the security configuration of the cap and can not unscrew it. Preferably, but not exclusively, said pressing force exerted on the cap is an axial bearing force. On the other hand, when the cap is in the unscrewing configuration, the outer casing is rotated in the first direction, which is preferably the anti-clockwise direction, corresponding to the conventional unscrewing direction. Thanks to the bearing force applied to the outer casing, the inner casing is also rotated in the same direction, which allows the cap to be unscrewed. It is understood that the closure means of the evaporation path, when in the closed position, provides a sealed tip before its first use. Thus, it is possible to limit the evaporation of the liquid contained in the mouthpiece during the storage of the mouthpiece as well as the contamination of the mouthpiece by dust or microorganism during storage. After the first opening of the cap, that is to say, when the cap is in a configuration other than the storage configuration, the sealing means passes to the open position of the evaporation path. As a result, air can advantageously pass between the two envelopes and allow evaporation of the liquid via this evaporation path. This makes it possible to prevent the liquid from stagnating at the dispensing opening of the mouthpiece, and thus the development of bacteria. Note that the sealing means remains in the open position and the evaporation path remains operational in the security configuration, and also preferably in the unscrewing configuration. In other words, the closing or opening of the evaporation path is carried out by the closure means, which once in the open position, remains in this position permanently, regardless of the movement or position of the outer and inner envelopes.

"The outer casing is configured to freely rotate relative to the inner casing in the first direction" means that the outer casing can rotate freely with respect to the inner casing in this direction without to join in rotation with the inner envelope. Thus when the cap is in safety configuration, the outer casing is configured to be rotated by the user in the first direction, while the inner casing remains stationary on the dispensing tip. In other words, a rotation in the first direction of the outer envelope does not have the effect of generating the rotation of the inner envelope in the first direction. The term "axial direction of the mouthpiece" is preferably understood to mean the direction defined by a geometric axis of the mouthpiece. The invention may further include one or more of the following features, taken alone or in combination. The closure means is arranged between the outer casing and the inner casing, the closure means and the inner casing each having a sealing surface and the sealing surfaces being in hermetic contact with each other; the other when the shutter means is in the closed position. Advantageously, the shutter means is not accessible by the user, which ensures the opening of the evaporation path when the tip is no longer in storage configuration. In particular, the sealing means is covered by the outer casing. - The shutter means passes from the closed position to the open position by a displacement of the closure means relative to the inner casing in the axial direction (A). Thus, the passage from one position to the other can be done by a simple axial translation of the closure means, or by the combination of a translation and a rotation. - The shutter means moves from the closed position to the open position by a rotation of the closure means relative to the inner envelope in the first direction. An advantage of rotating from one position to another is that the end piece is particularly compact, especially in the axial direction (A). The movement of the closure means may in particular be controlled by that of the outer casing throughout the first opening of the cap before reaching the open position in which the closure means is permanently fixed with the outer envelope or the inner envelope. This allows in particular a noise reduction between the parts and a better evaporation of the residual liquid product. - The inner casing comprises at least one air passage orifice, this orifice being closed by the closure means when in the closed position. For example the closure means is assembled on the inner casing, by tight assembly of the closure means on the inner casing, or by snapping of the closure means on the inner casing. This allows a satisfactory hermeticity of the tip in storage configuration. - The closure means comprises at least one air passage orifice which is positioned opposite the air passage orifice of the inner casing only when the closure means is in the open position. This allows a better air circulation via the evaporation path, since it thus creates a large air passage channel, delimited by superimposed air passage holes, on the inner envelope and on the shutter means, which allows to circulate more air than when the channel is delimited by spaces between the parts rather than specific orifices. - The outer casing comprises a screwing cooperating - in a cap screwing configuration with a screw abutment carried by the inner casing, so that the inner casing and the outer casing are connected in a rotational movement in a second direction opposite to the first direction, - in the safety configuration, with a sliding surface carried by the inner casing, so that a rotation of the outer casing in the first direction generates a sliding of the screwing projection on the sliding surface so as to freely rotate relative to the inner casing.

Thus according to this arrangement, the screwing and the safety configuration of the cap use a same element of the outer casing to ensure the coupling or decoupling of the outer casing with respect to the inner casing, namely the protrusion of the casing. screwing, which simplifies the manufacturing process and provides a more compact tip. - The sliding surface and the screw abutment carried by the inner casing together form a notch so as to generate a tactile and / or audible indication during the passage of the notch by the screwing projection in the security configuration. The user then observes a discontinuous movement of the outer casing and / or a noise which indicates that the cap is in a safety configuration and that the outer casing must be pressed to unscrew, for example axially. - The outer casing comprises a projection of unscrewing of the inner casing, and the inner casing comprises a unscrewing surface intended to cooperate with the unscrewing projection so that: - during the security configuration, a rotation of the casing outer shell in the first direction generates a relative movement of the unscrewing projection with respect to the unscrewing surface, so that the outer shell rotates freely with respect to the inner shell, - in the unscrewing configuration, a rotation of the outer casing in the first direction generates, by friction or abutment of the unscrewing projection on the unscrewing surface, a drive of the inner casing in the first direction, so as to unscrew the cap.

It is understood that in the case where the drive of the inner casing is by stop, the unscrewing projection comes into contact with the unscrewing surface only in unscrewing configuration. The drive by stop has the advantage of better handling of the tip because it requires less effort to open the cap. - The screwing projection and the unscrewing projection are combined. - The sealing means, the outer casing and the inner casing are inserts, that is to say distinct from each other. - The cap comprises return means for separating the unscrewing projection and the unscrewing surface when a pressing force exerted on the cap has an intensity lower than the predetermined threshold or when no bearing force is exerted on the hood. The return means comprise for example a flexible tongue or a conical circular skirt projecting from the inner surface of the outer casing. These return means also allow to separate the outer envelope of the inner casing to promote the evaporation of the residual liquid in the tip. The cap comprises a residual liquid absorption pad disposed near the liquid dispensing opening. This buffer is advantageously disposed downstream of the dispensing opening and makes it possible to drain a large part of the residual liquid out of the dispensing opening. - The cap comprises a protuberance intended to be in the immediate vicinity and facing the opening when the cap is mounted on the tip, this protuberance having a form of expulsion of the residual liquid, configured to discharge the residual liquid to the outside when the cap is mounted on the tip. Thanks to the presence of the form of expulsion of residual liquid made on the removable cap, when the cap is mounted on the nozzle, the expulsion form located in the immediate vicinity and facing the liquid dispensing opening expels most of the residual liquid present downstream of the dispensing opening, in particular to any residual liquid absorption buffer disposed in the vicinity, that is to say that the residual liquid is discharged to the outside the mouthpiece. Thus, most of the residual liquid is drained out of the dispensing opening. - The cap has on the outside of the outer envelope means embossed or visual indicating the user how to go from the security configuration to the unscrewing configuration. For example, the means may comprise a series of symbols such as arrows, numbers, text indicating the order of the actions to be conducted. Finally, the invention has a liquid distribution device having a liquid dispensing nozzle as described above mounted on a reservoir. The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the drawings in which: FIG. 1 is a perspective view of a dispensing device according to a first embodiment comprising a liquid dispensing nozzle with disassembled closure means, the liquid dispensing tip being carried by a reservoir and the outer casing removed; - Figure 2 is a perspective view of the inside of the outer casing of the tip of Figure 1; FIG. 3 is a perspective and partially transparent view of the tip of FIG. 1; - Figure 4 is a sectional view of the tip of Figure 1 in storage configuration; - Figure 5 is a sectional view of the tip of Figure 1 in safety configuration; - Figure 6 is a sectional view of the tip of Figure 1 in unscrewing configuration; FIG. 7 is a view similar to FIG. 1 of a dispensing device according to a second embodiment; FIG. 8 is a perspective view of the interior of the outer casing of the tip of FIG. 7; - Figure 9 is a sectional view of the tip of Figure 7 in storage configuration; FIG. 10 is a perspective and partially transparent view of the tip of FIG. 7 in the unscrewing configuration; - Figure 11 is a perspective view and partially transparent of the tip of Figure 7 in storage configuration; - Figure 12 is a view similar to Figure 1 of a dispensing device according to a third embodiment; FIG. 13 is a perspective view of the interior of the outer casing of the tip of FIG. 12; FIG. 14 is a perspective and partially transparent view of the tip of FIG. 12 in security configuration; - Figure 15 is a sectional view of the tip of Figure 12 in storage configuration; - Figure 16 is a sectional view of the tip of Figure 12 in safety configuration; - Figure 17 is a sectional view of the tip of Figure 12 in unscrewing configuration; - Figure 18 is a view similar to Figure 1 of a dispensing device according to a fourth embodiment; - Figure 19 is a perspective view in section of the inside of the outer casing of the tip of Figure 18; FIG. 20 is a perspective view of the interior of the inner casing of the nozzle of FIG. 18; - Figure 21 is a sectional view of the tip of Figure 18 in storage configuration; - Figure 22 is a sectional view of the tip of Figure 18 in safety configuration; and FIG. 23 is a perspective and partially transparent view of the tip of FIG. 18 in safety configuration.

A device, as shown in FIG. 1 and designated by the reference 20, comprises a deformable reservoir 12 which is a liquid storage tank, for example a pharmaceutical liquid such as ophthalmic liquid and a liquid dispensing tip 10. form of drops. The tip 10 comprises a dispensing portion 14 having an opening 22 for dispensing the liquid and is intended to be mounted by snapping, welding or screwing on the neck of the reservoir 12.

According to the four embodiments, the tip 10 comprises a removable cap 16 mounted by screwing on the dispensing portion 14 and intended to cover the opening 22 when the tip 10 is not used. The cap 16 has a proximal end (P) disposed on the side of the opening of the cap 16 and an opposite distal end (D) (see FIG. 3). The cap 16 comprises an outer casing 42 and an inner casing 44. These outer and inner casings 42, 44 are coaxial, movably mounted relative to each other in an axial direction (A) of the nozzle 10. axial direction (A) of the nozzle 10 is defined here by the geometric axis of the reservoir 12. The outer and inner envelopes 42, 44 are movable along this geometric axis, either by moving away or approaching the one compared to the other. With this mobility, the outer and inner casings 42, 44 can define in particular three distinct configurations of the tip 10, namely a configuration before first use, called storage configuration, a cap unscrewing configuration 16 and a security configuration. , which will be described in detail later.

Figures 1 to 6 illustrate a first embodiment of the nozzle 10, wherein the inner casing 44 comprises a cap 56, a first skirt 58 and a second skirt 59, of substantially cylindrical shapes interconnected by a plate 61 (see Figure 1). The ceiling 56 is delimited in this example by a cylindrical surface 60a connecting it to the second skirt 59 and comprises air passage holes 62, three in number in this example. The cylindrical surface 60a defines a sealing surface. The inner casing 44 further includes a circular peripheral groove 73 provided at the proximal end (P) of the inner casing 44. The inner casing 44 further comprises a plurality of guide slopes 67a (see Fig. 3). spaced apart from each other and extending from the first skirt 58 in the axial direction (A), each guide slope 67a having a sliding surface 19 and a screw abutment 13. The inner casing 44 further comprises a frangible ring 74 having the proximal end (P) of the cap 16, as visible in FIG.

As illustrated in Figure 2, the outer casing 42 comprises a bottom 76 and a peripheral wall 79, of substantially cylindrical shape. The bottom 76 is circular in shape and has attachment means 80, four in number in this example, each comprising a hook-shaped end 15 connected to the bottom 76 by a circular wall (see Figure 4). The attachment means 80 are distributed at the periphery of the bottom 76 and delimit between them a housing. The bottom 76 also comprises through-passing air orifices 82, each being formed in the vicinity of an attachment means 80. The outer casing 42 further comprises a plurality of gadroons 88 protruding from the inner surface of the casing. peripheral wall 79 (see FIG. 2). The outer shell 42 also includes a screw protrusion 18 provided on the inner surface of the outer shell 42 at the distal end (D). The screw protrusion 18 is here in the form of a tab 84 projecting from both the bottom 76 and the peripheral wall 79. The tab 84 more precisely comprises a lower surface, oriented towards the proximal end (P) of the cap 16, and a lateral surface 86 forming a lateral screw abutment 86.

In this embodiment, the tip 10 comprises a closure means 100 comprising a substantially flat disc 110 and a cylindrical wall 120 extending towards the proximal end (P) from the flat disc 110, and defining a surface sealing on the inner face of the cylindrical wall 120. The disc 110 is attached in the housing defined by the attachment means 80 of the outer casing 42, so that the sealing means 100 is retained by the means of 80 hooks through the hook-shaped ends 15.

We will now describe the mounting of the tip 10 according to this first embodiment, and its operation. The outer casing 42 is first mounted, with the disk 100, on the inner casing 44 by positioning the screwing projections 18 between two guide slopes 67a, as can be seen in FIG. 3, so that the disk 100 is mounted on the second skirt 59 of the inner casing 44, by fitting the cylindrical wall 120 on the cylindrical surface 60a with a tight fit. Thus in this assembly example, the cap 16 is ready to be mounted by screwing on the dispensing part 14. Once the reservoir 12 filled with the liquid to be dispensed, the tip 10 is returned, comprising the cap 16 and the dispensing part 14, on the neck of the tank 12, for example by screwing, latching or any other known technique. The tip 10 is in the storage configuration and is ready for use.

The storage configuration of the nozzle 10 is shown in Figure 4. The sealing means 100 covering the air passage holes 62 of the inner casing 44 is here in the closed position. The two sealing surfaces defined by the cylindrical wall 120 and the cylindrical surface 60a are in hermetic contact with each other in this closed position, so that there is no communication between the orifices. air passage 62 of the inner casing 44 and the air passages 82 of the outer casing 42.

In the first use, the user unscrews the cap 16. He tightens the outer envelope 42 in one hand and the reservoir 12 in the other hand. It rotates the outer casing 42 relative to the inner casing 44 in a first direction 1, which corresponds to the counterclockwise direction, visible in Figure 3. The screwing projections 18 are then guided by the guide slopes 67a and move on the sliding surfaces 19. The rotational movement applied by the user to the nozzle 10 generates an axial translational movement of the outer casing 42 relative to the inner casing 44. Through this movement outside of the storage configuration, the closure means 100 is driven by the attachment means 80 of the outer casing 42 and moves in the axial direction (A) relative to the inner casing 44 away from that As illustrated in FIG. 5, the sealing surfaces are separated from one another and a space is created between them so as to allow air to pass between them. The shutter means 100 moves from the shutter position to the open position. The residual liquid evaporation path passing through the air passages 62, 82 is closed in the storage configuration and opened in the safety and unscrewing configuration.

Once the cap 16 is no longer in the storage configuration, the user, preferably an adult, can open the cap 16 by applying a support force of intensity greater than a predetermined threshold, in the present case an axial support force. The cap 16 is then put in unscrewing configuration. In this configuration, by the rotation of the outer casing 42 in the first direction 1, combined with the pressing force, each screwing projection 18 abuts against a corresponding sliding surface 19. The bearing force on the outer casing 42 is then transmitted to the sliding surface 19, so that a friction is created between the screwing projection 18 and the sliding surface 19. This friction makes it possible to secure the projection of screwing 18 and the sliding surface 19 so that the outer casing 42 can drive the inner casing 44 in rotation in this first direction 1, without the screwing projection 18 slipping on the sliding surface 19, or with a sliding that generates sufficient friction to rotate the inner casing 44. In this example, the sliding surface 19 is also an unscrewing surface. The cap 16 is thus unscrewed from the dispensing portion 14. Gripping ribs 78 are disposed at the outer periphery of the outer casing 42 in order to facilitate the transmission of the bearing and rotation forces.

It is understood that when the user continues the rotational movement of the cap 16 relative to the reservoir 12 to completely unscrew the cap 16 of the dispensing portion 14, it breaks the frangible portions of the ring 74. Thus, this ring 74 allows to check in a simple way that the tip 10 has not been opened beforehand. The groove 73 of the inner casing 44 is configured to receive the gadroons 88 so as to allow free rotation of the gadroons 88 in the groove 73 without the outer casing 42 being completely detached from the inner casing 44.

Subsequently, if the user, a child for example, only rotates the outer casing 42 in the first direction 1, without pressing axially enough on the bottom 76, the cap 16 is found in the security configuration. Since the force transmitted to the sliding surface 19 does not create a sufficiently high friction, the screwing projection 18 moves on the guide slope 67a to its top. Then, the screw projection 18 returns to the bottom of the guiding slope 67a and the outer casing 42 returns to its lower position relative to the inner casing 44. In this way, a rotation of the outer casing 42 in the first direction 1 generates a sliding of the screwing projection 18 successively on each sliding surface 19, so as to rotate freely relative to the inner casing 44. In this safety configuration, the screwing protrusions 18 move from a guide slope 67a to another intermittently. Thus, the guide slopes 67a, spaced apart from each other form a discontinuous cam path and the passage of the discontinuity of the cam path by the screwing projection 18 generates a tactile indication or sound.

Between two uses, the user revives the cap 16 on the dispensing portion 14. It is sufficient to turn the outer casing 42 in a second direction 2, corresponding to the clockwise direction, without exerting specific support force. Each lateral screwing abutment 86 carried by the screwing projection 18 then abuts against the screwing abutment 13 carried by the inner casing 44. Thus, the two outer and inner casings 42, 44 are connected in a rotational movement in the second direction 2, and the cap 16 can be screwed.

When the outer casing 42 is in the lower position relative to the inner casing 44, the closure means 100 comes into contact with the second skirt 59. Since the ceiling 56 has a larger diameter than that of the cylindrical wall 120 of the closure means, the ceiling 56 pushes the cylindrical wall 120 in its housing without the shutter means 100 can return to its closed position as shown in Figure 6. It is therefore understood that it is possible to move from the storage configuration of the tip 10 to the security configuration or unscrewing but the opposite is not possible. Thus, it is ensured that once the tip 10 has been opened at least once, the evaporation path of the residual liquid is always open.

Figures 7 to 11 illustrate a second embodiment of the nozzle 10, wherein the inner casing 44 comprises a cap 56, a first skirt 58 and a second skirt 59, of substantially cylindrical shapes interconnected by a plate 61 Ceiling 56 includes air passage holes 62, three in number in this example. The second skirt 59 comprises at its end a flange 60b, having a substantially frustoconical peripheral surface in which two stop points 260 are arranged on either side with respect to the axis of the endpiece 10. The ceiling 56 defines in this example a sealing surface. The inner casing 44 further comprises a plurality of guide lands 67b spaced apart from each other and extending from the first skirt 58 in a direction transverse to the axial direction (A), each guide slope 67b having a sliding 29 and a screw abutment 23. The inner casing 44 further comprises a frangible ring 74 at the proximal end (P) of the cap 16, as visible in FIG. 9.

As in the first embodiment, the inner casing 44 comprises a circumferential peripheral groove 73 arranged at the proximal end (P) of the inner casing 44. The groove 73 is delimited by an upper rim 73a and a lower rim. 73b as shown in Figure 7. The inner casing 44 comprises a plurality of notches 27a extending from the upper flange 73a of the groove 73 in the axial direction (A) and each having a unscrewing surface 26. The notches 27a and guide slopes 67b are interposed.

As can be seen in FIG. 8, the outer envelope 42 comprises a bottom 76 and a peripheral wall 79, of substantially cylindrical shape. The bottom 76 is circular in shape and has return means 25, in this example in the form of flexible tabs 25 extending from the bottom 76 towards the proximal end (P) and slightly towards the center of the casing 42. The flexible tongues 25 are four in this example. The bottom 76 also includes air passages 82, each in the vicinity of a flexible tongue 25. The outer casing 42 further comprises a plurality of gadroons 88 projecting from the inner surface of the peripheral wall 79. The outer casing 42 comprises several screwing protrusions 28, arranged on the inner surface of the peripheral wall 79. The screwing projection 28 is here in the form of a flexible blade 28 connected to the peripheral wall 79 by a longitudinal side of the flexible blade 28. Thus, the flexible blade 28 is able to flex around this longitudinal side. Its opposite side has a lateral screw stop 28a. The outer casing 42 further comprises, on the inner surface of the peripheral wall 79, a plurality of unscrewing projections 27, having a thickness which increases from the distal end (D) towards the proximal end (P) of the Outer casing 42. Each unscrewing projection 27 has a lateral unscrewing abutment 27b (see FIG. 11).

In this embodiment, the nozzle 10 comprises a sealing means 200 comprising a substantially flat disk 230 having a sealing surface and comprising a substantially cylindrical peripheral skirt, in the form of two spaced semi-annular walls 240 between them by a void area and extending axially from the periphery of the sealing surface. The sealing means 200 comprises two flexible tabs 210, each of semi-annular shape and extending from a semi-annular wall 240 to the empty zone. In other words, the flexible tabs 210 each define, with each semi-annular wall 240, an L-shaped notch defining a bayonet shape (see Figure 7). Each semi-annular wall 240 and each flexible tab 210 also has, on the proximal (P) side, an internal rim 250 (see FIG. 9). The disc 230 also has air passage holes 220, three in number in this example, of circular shape.

The sealing means 200 is mounted on the second skirt 59 of the inner casing 44 by snap-fitting engagement between the flange 60b and the internal rim 250 of the closure means 200. Thanks to the elasticity of the flexible tabs 210, the sealing means 200 is fixedly mounted with respect to the second skirt 59 in the axial direction (A), the collar 60b abutting with the internal rim 250 of the sealing means 200. Furthermore, the sealing means 200 is rotatably mounted relative to the second skirt 59.

We will now describe the mounting of the tip 10 according to this second embodiment, and its operation. The outer casing 42 is first mounted on the inner casing 44 by positioning a screw projection 28 and an unscrewing projection 27 between two guide slopes 67b, as can be seen in FIG. 11. The flexible tongues 25 are then in abutment against the flat disk 230 of the closure means 200 and the gadroons 88 are in abutment against the upper rim 73a, so that the two outer and inner shells 42, 44 are secured in the axial direction (A) in storage configuration, as shown in Figure 11. In this position, the flexible tabs 210 are supported on their respective stop point 260 and the unscrewing projections 27 are above the notches 27a and are not in contact with them. Thus, the cap 16 is ready to be mounted by screwing on the dispensing portion 14. Once the reservoir 12 filled with the liquid to be dispensed, it comes bring the tip 10, comprising the cap 16, on the neck of the tank 12, for example by screwing, latching or any other known technique. The tip 10 is ready to use.

The storage configuration of the nozzle 10 is shown in FIG. 11. The air passage orifices 220 carried by the closure means 200 are offset relative to the air passage orifices 62 of the inner casing 44. The air passages 62 of the inner casing 44 are thus closed by the closure means 220. The two sealing surfaces defined by the ceiling 56 and the disc 230 are in hermetic contact with each other. other so that there is no communication between the air passage holes 62 of the inner envelope 44 and the air passage holes 82 of the outer envelope 42. Thus the means of shutter 200 is in the closed position in this storage configuration.

In the first use, the user unscrews the cap 16. He tightens the outer envelope 42 in one hand and the reservoir 12 in the other hand. It rotates the outer casing 42 with respect to the inner casing 44 in a first direction 1, which corresponds to the counterclockwise direction, visible in FIG. 11. The flexible tabs 25 then drive the shutter means 200 in rotation, thanks to the friction created between the flexible tongues 25 and the disk 230. The rotation of the sealing means 200 is limited by the two stopping points 260, which abut against the semi-annular walls 240. The through holes air 220 are configured to position each opposite an orifice 62 of the inner casing 44 when the closure means 200 reaches the end of the course of rotation, as can be seen in FIG. shutter means 200 passes from the closed position to the open position by a rotation of the closure means 200 relative to the inner casing 44 in the first direction 1. The evap path residual liquid oration is closed in the storage configuration and opened in the safety and unscrewing configuration. The closure means 200 is locked in its open position by the end of the flexible tabs 210 which abut against the stopping points 260 during any rotation in the second direction 2, opposite to the first direction 1. L user, preferably an adult, can then open the cap 16 by applying an axial bearing force at an intensity greater than a predetermined threshold against the restoring force of the flexible tongues 25. The outer casing 42 then moves in the axial direction (A) approaching the inner casing 44 and the screwing projections 28 are positioned at the same level as the notches 27a. It rotates at the same time the outer casing 42 relative to the inner casing 44 in a first direction 1 which corresponds to the counterclockwise direction. The cap 16 is then put in unscrewing configuration.

In this unscrewing configuration, each unscrewing projection 27 abuts against an unscrewing surface 26 carried by the notch 27a, which makes it possible to secure the outer and inner shells 42, 44. The outer casing 42 therefore drives the casing In this first direction 1. The cap 16 is thus unscrewed from the dispensing portion 14. Gripping ribs 78 are disposed at the outer periphery of the outer casing 42 in order to facilitate the transmission of the bearing forces. and rotation.

It is understood that when the user continues the rotational movement of the cap 16 relative to the reservoir 12 to completely unscrew the cap 16 of the dispensing nozzle 14, it breaks the frangible portions of the ring 74. Thus, this ring 74 allows to check in a simple way that the tip 10 has not been opened beforehand. The groove 73 of the inner casing 44 is configured to receive the gadroons 88 so as to allow free rotation of the gadroons in the groove 73 without the outer casing 42 being completely detached from the inner casing 44, thanks to the present invention. upper flanges 73a.

According to an alternative of the frangible ring 74, the cap 16 may comprise zones having different colors on the closure means 200, each zone being positioned to face an air passage orifice 82 carried by the outer envelope 42, storage configuration or after the first opening of the nozzle 10. The user is informed if the tip has already been opened or not, depending on the color displayed.

Subsequently, if a child, for example, only rotates the outer casing 42 in the first direction 1 without pressing axially hard enough on the bottom 76, the cap 16 is found in the security configuration. Indeed, the flexible tongues 25 allow to separate the outer casing 42 of the inner casing 44 so that the unscrewing projections 27 can not come into contact with the notches 27a. The flexible blades 28 slide on the sliding surfaces 29 carried by the guide slopes 67b and compress by advancing on the guide slopes 67b. When the flexible blades 28 are no longer in contact with the guide slopes 67b, they decompress and return to their initial position. In this way, a rotation of the outer casing 42 in the first direction 1 generates a sliding of the flexible blade 28 successively on each sliding surface 29 so as to rotate freely relative to the inner casing 44. safety configuration, the flexible blades 28 move from one guide slope 67b to another intermittently. Thus, each sliding surface 29 and the neighboring screwing abutment 23 form a notch. The passage of each flexible blade 28 on each notch generates a tactile indication, see sound.

Between two uses, the user adjusts the cap 16 on the dispensing portion 14. It is sufficient simply to turn the outer casing 42 in a second direction 2, corresponding to the clockwise direction without exerting specific support force. Each lateral screwing abutment 28a, carried by the screwing projection 28, then abuts against the screwing abutment 23 carried by the guide slope 67b. Thus, the two outer and inner shells 42, 44 are linked in a rotational movement in the second direction 2 and the cap 16 can be screwed.

It is therefore understood that it is possible to switch from the storage configuration of the tip 10 to the security or unscrewing configuration, but that the opposite is not possible. Thus, it is ensured that once the tip 10 has been opened at least once, the evaporation path of the residual liquid is always open.

Figures 12 to 17 illustrate a third embodiment of the nozzle 10, wherein the inner casing 44 comprises a ceiling 56, a first skirt 58 and a second skirt 59, of substantially cylindrical shapes interconnected by a plate 61 As can be seen in FIG. 12, the ceiling 56 comprises orifices 62 for the passage of air, three in number in this example. The second skirt 59 comprises a return means in the form of a deformable wall 60c (see FIG. 15) extending from the periphery of the ceiling 56 and comprises an inner rim at its distal end (D). The rim defines in this example a sealing surface. The inner casing 44 further includes a plurality of guide slopes 67c spaced apart from each other and extending from the first skirt 58 in a direction transverse to the axial direction (A), each guide slope 67c having a surface sliding member 39 and a screw stop 33 (see FIG. 12). The inner casing 44 furthermore comprises a frangible ring 74 at the proximal end (P) of the cap 16, as can be seen in FIG. 14. The inner casing 44 comprises an upper rim 73a arranged between the first skirt 58 and the proximal end (P). The inner casing 44 includes a plurality of notches 36a extending from the plate 61 in the axial direction (A) and each having an unscrewing surface 36 (see FIG. 12). The notches 36a and the guide slopes 67c are arranged in an intermediate manner.

As can be seen in FIG. 13, the outer casing 42 comprises a bottom 76 and a peripheral wall 79, of substantially cylindrical shape. The bottom 76 is circular in shape and comprises blades 35 extending from the bottom 76 towards the proximal end (P) of the outer casing 42. The blades 35 substantially form a conical circular skirt projecting from the inner surface of the outer casing 42, so that the inner surfaces of the blades 35 have substantially a discontinuous cone shape. The blades 35 are four in this example. The bottom 76 further comprises at its center a projecting, rigid ring. The bottom 76 also includes air passages 82, each in the vicinity of a blade 35. The outer casing 42 further comprises a plurality of gadroons 88 protruding from the inner surface of the peripheral wall 79. outer casing 42 comprises a plurality of screwing projections 38 arranged on the inner surface of the peripheral wall 79. The screwing projection 38 is here in the form of a flexible blade 38 connected to the peripheral wall 79 by a longitudinal side of the blade flexible 38. Thus, the flexible blade 38 is able to flex around this longitudinal side. Its opposite side has a lateral screw abutment 38a (see Figure 13). The outer casing 42 further comprises on the inner surface of the peripheral wall 79 a plurality of unscrewing projections 37 arranged at the proximal end (P) of the outer casing 42. Each unscrewing projection 37 has a lateral unscrewing stop 37b.

In this embodiment, the nozzle 10 comprises a shutter means 300 in the form of a substantially flat disc which is in the form of a pellet, the peripheral surface of which defines a sealing surface. The pellet 300 has, on one side facing the proximal end (P), protruding lines. The shutter means 300 is mounted on the rim of the deformable wall 60c by a snug fit in the storage configuration.

We will now describe the mounting of the tip 10 according to this third embodiment, and its operation. The outer casing 42 is first mounted on the inner casing 44 by positioning each unscrewing projection 37 between two notches 36a. In this position, the unscrewing protrusions 37 are above the notches 36a and are not in contact therewith. The deformable wall 60c is positioned between the blades 35 and the gadroons rest on the upper rim 73a, so that the two outer and inner shells 42, 44 are secured in the axial direction in the storage configuration, as can be seen in FIG. FIG. 21. Thus, the cap 16 is ready to be mounted by screwing on the remainder of the dispensing portion 14. Once the reservoir 12 is filled with the liquid to be dispensed, the tip 10, comprising the cap 16, is brought back. on the neck of the tank 12, for example by screwing, latching or any other known technique. The tip 10 is in the storage configuration, ready for use.

The storage configuration of the nozzle 10 is shown in FIG. 15. The two sealing surfaces defined by the deformable wall 60c and by the peripheral surface of the sealing means 300 are in hermetic contact with each other , so that there is no communication between the orifices 62 for air passage of the inner casing 44 and the orifices 82 for air passage of the outer casing 42. The orifices 62 of the inner shell 44 are closed by the shutter means 300. Thus, the shutter means 300 is in the closed position in this storage configuration.

In the first use, the user unscrews the cap 16. He tightens the outer envelope 42 in one hand and the reservoir 12 in the other hand. It presses on the outer casing 42 axially and turns it simultaneously with respect to the inner casing 44 in a first direction 1, which corresponds to the counterclockwise direction, visible in FIG. 14. The outer casing 42 then moves in the axial direction (A) approaching the inner casing 44 and the projecting ring comes into contact with the shutter means 300 and drives it in the same displacement. The sealing means 300 is thus pushed into the deformable wall 60c and can not come out thanks to the rim of the deformable wall 60c. Thanks to the protrusion lines which are arranged on the closure means 300, a space is always present between the shutter means 300 and the ceiling 56, to guarantee the flow of air between the orifices 62 and the outside of the shutter. Thus, the closure means 300 moves from the closed position to the open position by a translational movement of the closure means 300 relative to the inner casing 44, in the axial direction (A). ).

After the first opening of the nozzle 10, the sealing surfaces are no longer in hermetic contact with each other. The two outer and inner envelopes 42, 44 have air passages 62, 82 for creating a path of evaporation of the residual liquid between the opening 22 and the outside of the nozzle 10. The path of Residual liquid evaporation is closed in the storage configuration and opened in the safety and unscrewing configuration. The user, preferably an adult, can open the cap 16 by applying a force having an intensity greater than a predetermined threshold. The cap 16 is then put in unscrewing configuration.

In this unscrewing configuration, after displacement of the outer casing 42 in the axial direction (A) approaching the inner casing 44, the unscrewing projections 37 are positioned at the same level as the notches 36a. During the rotation of the outer casing 42, each unscrewing projection 37 abuts against an unscrewing surface 36 carried by the notch 36a, which makes it possible to secure the outer and inner casings 42, 44. The outer casing 42 thus causes the inner casing 44 to rotate in this first direction 1. The cap 16 is thus unscrewed from the remainder of the tip 10. Gripping ribs 78 are disposed at the outer periphery of the outer casing 42 to facilitate the transmission of support and rotation forces.

It is understood that when the user continues the rotational movement of the cap 16 relative to the reservoir 12 to completely unscrew the cap 16 of the dispensing portion 14, it breaks the frangible portions of the ring 74. Thus, this ring 74 allows to check in a simple way that the tip 10 has not been opened beforehand. The upper edge 73a of the inner envelope 44 is configured to prevent the outer envelope 42 from being completely detached from the inner envelope 44.

Subsequently, if the user, a child for example, only rotates the outer casing 42 in the first direction 1, without pressing axially enough on the bottom 76, the cap 16 is found in the security configuration. Due to the restoring force created by the deformation of the deformable wall 60c, it pushes the inner surfaces of the blades 35, which keeps the outer casing 42 of the inner casing 44 separate so that the projections the unscrewing members 37 can not come into contact with the notches 36a, as can be seen in FIG. 16. The flexible blades 38 slide on the sliding surfaces 39 carried by the guide slopes 67c and compress by advancing on the slopes. When the flexible blades 38 are no longer in contact with the guide slopes 67c, they decompress and return to their initial position. In this way, a rotation of the outer casing 42 in the first direction 1 generates a sliding of the flexible blade 38 successively on each sliding surface 39, so as to rotate freely relative to the inner casing 44. In this safety configuration, the flexible blades 38 move from one guide slope 67c to another intermittently. Thus, the guide slopes 67c, spaced apart from each other form a discontinuous cam path and the passage of the discontinuity of the cam path by the flexible blade 38 generates a tactile indication, or even sound.

Between two uses, the user revives the cap 16 on the dispensing portion 14. It is sufficient to turn the outer casing 42 in a second direction 2, corresponding to the clockwise direction, without exerting specific support force. Each lateral screwing abutment 38a carried by the screwing projection 38 then abuts against the screw stop 33 carried by the guide slope 67c. Thus, the two outer and inner shells 42, 44 are linked in a rotational movement in the second direction 2 and the cap 16 can be screwed.

Once the shutter means 300 is found in the deformable wall 60c, it can not return to the closed position. It is therefore understood that it is possible to switch from the storage configuration of the tip 10 to the safety or unscrewing configuration but that the opposite is not possible. Thus, it is ensured that once the tip 10 has been opened at least once, the evaporation path of the residual liquid is always open.

FIGS. 18 to 23 illustrate a fourth embodiment of the nozzle 10, in which the inner envelope 44 comprises a first portion 441 as illustrated in FIG. 18. This first portion 441 of the inner envelope 44 comprises a ceiling 56, a first skirt 58 and a second skirt 59, of substantially cylindrical shapes interconnected by a plate 61. The ceiling 56 is delimited, in this embodiment, by a cylindrical surface 60d connecting it to the second skirt 59 and comprises air passage openings 62, three in number in this example. The second skirt 59 defines a sealing surface. The first portion 441 of the inner envelope 44 further comprises two guide slopes 67d spaced apart from each other and extending from the first skirt 58 in the axial direction (A), each guide slope 67d having a guide surface 68. The first portion 441 of the inner casing 44 also comprises two elastic tabs 66 and two attachment stops 70 (see Figure 18). The first portion 441 of the inner envelope 44 further comprises an upper rim 73a arranged between the first skirt 58 and the proximal end (P) and a frangible ring 74 at the proximal end (P) of the cap 16, as visible 23. The inner envelope 44 comprises a second portion 442 as visible in Figures 18 and 20. This second portion 442 comprises a bottom 444 and a cylindrical body 443 having an inner surface on which are arranged two notches 84 and complementary fixing abutments 87. The bottom 444 comprises a plurality of branches 445 each extending radially from the center to the periphery of the bottom 444. The branches 445 form a six-pointed star according to the illustrated example. Each branch 445 has a sliding surface 49 and an unscrewing surface 46. The second portion 442 of the inner casing 44 further includes flutes 880 at the proximal proximity (P).

As can be seen in FIG. 19, the outer casing 42 comprises a bottom 76 and a peripheral wall 79, of substantially cylindrical shape. The bottom 76 is of circular shape and comprises screwing projections 45, three in number for example, extending from the bottom 76. The screwing projection 45 is here in the form of flexible tongues 45 connected to the bottom 76 by their small side. Thus, a flexible tongue 45 is able to flex around this small side. Its opposite side has a free end forming a lateral screw stop 45a. The bottom 76 further comprises unscrewing projections 47 arranged at the periphery of the bottom 76, each unscrewing projection 47 having a lateral unscrewing abutment 47b. The bottom 76 also includes air passages 82, each in the vicinity of a flexible tongue 45. The outer casing 42 further comprises a flange 89 at its proximal end (P).

In this embodiment, the nozzle 10 comprises a sealing means 400 comprising a ring 410 whose inner surface defines a sealing surface. The crown 410 is carried by the second portion 442 of the inner casing 44 and the base of the crown 410 coincides with the bottom 444 of the second portion 442.

We will now describe the mounting of the tip 10 according to this fourth embodiment, and its operation.

The second portion 442 of the inner casing 44 is first mounted on the first portion 441 of the inner casing 44 by positioning the attachment stops 70 of the first portion 441 of the inner casing 44 along the stops of complementary fixing 87 of the second portion 442 of the inner casing 44, so that the complementary fixing abutments 87 are positioned facing the bottom of the guide slopes 67d. The crown 410 of the closure means 400 is mounted on the second skirt 59 of the first portion of the inner casing 44 with a snug fit. Then, the outer casing 42 is mounted on the inner casing 44, the flexible tongues 45 being in abutment against the branches 445 or the bottom 444, and the rim 89 of the outer casing 42 bearing against the upper rim 73a of the first portion 441 of the inner casing 44, so that the two outer and inner casings 42, 44 are secured in the axial direction (A) in the storage configuration, as can be seen in FIG. 21. Thus, the cap 16 is ready to be mounted by screwing on the remainder of the nozzle 10. Once the reservoir 12 filled with the liquid to be dispensed, it comes bring the tip 10, comprising the cap 16, on the neck of the tank 12, for example by screwing, latching or any other known technique. The tip 10 is ready to use.

The storage configuration of the nozzle 10 is shown in FIG. 21. The two sealing surfaces defined by the second skirt 59 and the inner surface of the crown 410 of the sealing means 400 are in hermetic contact with one another. with the other, so that there is no communication between the air passages 62 of the inner casing 44 and the air passages 82 of the outer casing 42. The orifices 62 of the inner envelope 44 are closed by the shutter means 400. Thus the shutter means 400 is in the closed position in this storage configuration. The user, preferably an adult, can open the cap 16 by applying a pressing force at an intensity higher than a predetermined threshold. The cap 16 is then put in unscrewing configuration. In the first use, the user unscrews the cap 16. He tightens the outer envelope 42 in one hand and the reservoir 12 in the other hand. It presses, axially in this example, on the outer casing 42 against the restoring force of the flexible tongues 45. The outer casing 42 then moves in the axial direction (A) while approaching the inner casing 44, and the unscrewing projections 47 are positioned at the same level as the bottom 444. At the same time, it turns the outer casing 42 with respect to the inner casing 44 in a first direction 1 which corresponds to the counterclockwise direction, visible on the 23. The lateral unscrewing abutments 47b carried by the unscrewing projections 47 are then brought into abutment against the unscrewing surfaces 46. The second part 442 of the inner casing 44, as well as the closure means 400 which is carried by this envelope 44, are rotated in the same first direction 1. Simultaneously, each complementary fixing stop 87 is guided by the guide slopes e 67d and the rotational movement applied by the user on the outer casing 42 generates a longitudinal translation movement of the second portion 442 of the inner casing 44 relative to its first portion 441. Arrivals at the end of the guide slopes 67d, the complementary fixing abutments 87 abut one end of the elastic tabs 66. In addition, during this rotation, the securing notches 84 of the second part 442 move relative to the elastic tabs 66, which they pass through. force, at the end of rotation, by deformation of the tabs 66, so that the fixing notches 84 are in abutment against the other end of the elastic tabs 66. In this way, the second portion 442 of the inner casing 44 is locked in this position relative to the first portion 441 of the inner casing 44. The closure means 400, being integral with the second portion 442 of the envel inner oppe 44, then moves away from the first portion 441 of the inner casing and the crown 410 is placed up to the level of the cylindrical surface 60d and is no longer in hermetic contact with the second skirt 59. Thus the means shutter 400 passes from the closed position to the open position by a rotational movement of the shutter means 400 relative to the inner casing 44 in the first direction 1.

After the first opening of the nozzle 10, the sealing surfaces are no longer in hermetic contact with each other. The two outer and inner shells 42, 44 have air passages 62, 82 for creating a path of evaporation of the residual liquid between the opening 22 and the outside of the nozzle 10. The path of Residual liquid evaporation is closed in the storage configuration and opened in the safety and unscrewing configuration.

In this configuration, once the closure means 400 is locked in the closed position, the first portion 441 and the second portion 442 of the inner casing 44 are secured and the outer casing 42 can cause the inner casing 44 in rotation in the first and second directions 1, 2. Gripping ribs 78 are disposed at the outer periphery of the outer casing 42 to facilitate the transmission of the bearing and rotational forces.

It is understood that when the user continues the rotational movement of the cap 16 relative to the reservoir 12 to completely unscrew the cap 16 of the dispensing portion 14, it breaks the frangible portions of the ring 74. Thus, this ring 74 allows to check in a simple way that the tip 10 has not been opened beforehand. The upper rim 73a of the inner casing 44 is configured to prevent the outer casing 42 from being completely detached from the inner casing 44.

According to an alternative to the frangible ring 74, the cap 16 may comprise other means of indicating that the cap is in a configuration other than the storage configuration, that is to say, that the cap 16 has already been opened once. For example, the first portion 441 of the inner envelope 44 comprises two differently colored areas and the second portion 442 the inner envelope 44 includes a slot for displaying one of the color areas according to the configuration of the tip 10 The outer casing 42 also includes one or more slots for viewing the color displayed in the slot carried by the second portion 442 of the inner casing 44. The cap 16 according to this embodiment is simpler and less expensive to make. . It is therefore conceivable to replace the frangible ring 74 described above by the combination of the registration surface and the reference surface. It is also possible to combine the two embodiments to make the indication of the opening of the cap 16 to the user easier and safer.

Subsequently, if the user, a child for example, only rotates the outer casing 42 in the first direction 1 without pressing axially enough on the bottom 76, the cap 16 is found in the security configuration. Indeed, the flexible blades allow to separate the outer casing 42 of the inner casing 44, so that the unscrewing projections 47 can not come into contact with the branches 445, as shown in Figure 22. The flexible tongues 45 slide on the sliding surfaces 49 carried by the branches 445 and compress on these surfaces. When the flexible blades 38 are no longer in contact with the branches 445, they are decompressed to the bottom 444 of the second portion 442 of the inner casing 44. In this way, a rotation of the outer casing 42 in the first direction generates a sliding of the flexible tabs 45 successively on each sliding surface 49 so as to rotate freely relative to the inner casing 44. In this safety configuration, the flexible tabs 45 move from a branch 445 to a other intermittently. Thus, the branches 445, spaced apart from each other form a discontinuous cam path and the passage of the discontinuity of the cam path by the branch 445 generates a tactile indication or sound.

Between two uses, the user adjusts the cap 16 on the dispensing portion 14. It is sufficient simply to turn the outer casing 42 in a second direction 2, corresponding to the clockwise direction, without exerting specific support force. Each lateral screwing abutment 45a carried by the flexible tongue 45 then abuts against the branch 445. Thus, the two outer and inner shells 42, 44 are connected in a rotational movement in the second direction 2 and the cap 16 can be screwed.

Once the shutter means 400 is in the open position, it can not return to the shutter position. It is therefore understood that it is possible to switch from the storage configuration of the tip 10 to the safety or unscrewing configuration but that the opposite is not possible. Thus, it is ensured that once the tip 10 has been opened at least once, the evaporation path of the residual liquid is always open.

In each of the embodiments mentioned, the cap 16 may comprise a protuberance 40 (see FIG. 4) intended to be in the immediate vicinity and facing the opening 22 when the cap 16 is mounted on the endpiece 10, this protrusion 40 having a residual liquid expulsion form, configured to discharge the residual liquid outwardly when the cap 16 is mounted on the nozzle 10. The cap 16 may also comprise, alternatively or in combination, a buffer 48 of residual liquid absorption, fixed on the cap 16 and more particularly on the inner casing 44. The buffer 48 may be substantially annular in shape or in the form of a solid disc. It may possibly be arranged around the expulsion form of the residual liquid. Examples of expulsion form 40 and buffer 48 and their mountings in cap 16 are described in WO2013 / 14069.

The cap 16 may have, on the outside of the outer casing 42, at the bottom 76 relief or visual means, indicating to the user how to go from the security configuration to the unscrewing configuration. These means may comprise a first arrow with the number "1" indicating that the first step to open the cap 16 is to axially support the outer envelope 42 to the reservoir 12 and a second arrow with the number "2" indicating that the second step to open the cap 16 is to rotate the outer casing 42 in the first direction 1 relative to the reservoir 12. The invention is not limited to the embodiments described. In particular, it will be understood that the functionalities of the various embodiments can easily be combined or isolated. Moreover, it is possible to provide an absorption pad 48 alone, without necessarily providing on the inner casing 44 a protuberance having a form of expulsion. In addition, it is understood that the structural forms of the means described can easily vary while performing functions such as those described.

Claims (14)

claims 1. nozzle (10) for dispensing liquid, characterized in that it comprises: - a liquid distribution opening (22), - a cap (16) removable for covering said opening (22) when mounted on the nozzle (10), a residual liquid evaporation path disposed between the opening (22) and the outside of the nozzle (10) when the removable cap (16) is mounted on the nozzle ( 10), - a shutter means (100, 200, 300, 400) of the evaporation path, movable in the cap (16) between a closed position and an open position of the evaporation path; the cap (16) comprising an outer shell (42) and a coaxial inner shell (44) movably mounted relative to each other in an axial direction (A) of the nozzle (10) between: a configuration before first use, said storage configuration, wherein the shutter means (100, 200, 300, 400) is in the closed position; . an unscrewing configuration of the cap (16) when a pressing force exerted on the cap (16) has an intensity greater than a predetermined threshold, wherein a rotation in a first direction (1) of the outer casing (42) ) rotates the inner casing (44) in the same first direction (1) so that the cap (16) can be unscrewed; . a safety configuration when a pressing force exerted on the cap (16) has an intensity lower than the predetermined threshold or when no bearing force is exerted on the cap (16), in which the outer casing (42) is configured to freewheel with respect to the inner casing (44) in the first direction (1), the security configuration further corresponding to a configuration in which the closing means (100, 200, 300, 400) is in the open position. the closing means (100, 200, 300, 400) being configured to be driven by the relative movement between the outer casing (42) and the remainder of the end piece (10) in order to pass from the position of shutter at the open position. 2. Tip (10) according to the preceding claim, wherein the closure means (100, 200, 300, 400) is arranged between the outer casing (42) and the inner casing (44), the means of closure (100, 200, 300) and the inner casing (44) each having a sealing surface and the sealing surfaces being in sealing contact with each other when the sealing means (100, 200 , 300, 400) is in the closed position. 3. Tip (10) according to the preceding claim, wherein the closure means (100, 300) moves from the closed position to the open position by a displacement of the closure means (100, 300) by relative to the inner casing (44) in the axial direction (A). The mouthpiece (10) according to any one of the preceding claims, wherein the shutter means (200, 400) moves from the shutter position to the open position by rotation of the shutter means (200). , 400) relative to the inner casing (44) in the first direction (1). A mouthpiece (10) as claimed in any one of the preceding claims, wherein the inner envelope (44) comprises at least one air passage (62), said air passage (62) being closed off by the closure means (100, 200, 300, 400) when in the closed position, for example the closure means is assembled on the inner casing (44) by close assembly of the closure means (100, 300, 400) on the inner casing (44) or by snapping the closure means (200) on the inner casing (44). 6. Tip (10) according to the preceding claim, wherein the closure means (100, 200, 300, 400) comprises at least one air passage (82) which is positioned opposite the orifice of air passage (62) of the inner casing (44) only when the closure means (100, 200, 300, 400) is in the open position. 7. Tip (10) according to any one of the preceding claims, wherein the outer casing (42) comprises a screwing projection (18, 28, 38, 45) cooperating: - in a configuration of screwing the cap (16). ) with a screw stop (13, 23, 33, 43) carried by the inner casing (44), so that the inner casing (44) and the outer casing (42) are rotatably connected in a second direction (2) opposite the first direction (1), - in the safety configuration, with a sliding surface (19, 29, 39, 49) carried by the inner envelope (44), so that a rotation of the outer casing (42) in the first direction (1) generates a sliding of the screwing projection (18, 28, 38, 45) on the sliding surface (19, 29, 39, 49) so as to rotate freely with respect to the inner casing (44). 8. Tip (10) according to the preceding claim, wherein the sliding surface (19, 29, 39, 49) and the screw abutment (13, 23, 33, 43) carried by the inner casing (44) form together a notch so as to generate a tactile and / or audible indication during the passage of the notch by the screwing projection (18, 28, 38, 45) in the safety configuration. The mouthpiece (10) according to any one of the preceding claims, the outer shell (42) comprises an unscrewing projection (18, 27, 37, 47) of the inner shell (44), and the inner shell (44) comprises an unscrewing surface (19, 26, 36, 46) for cooperating with the unscrewing projection (18, 27, 37, 47) so that: - in the safety configuration, a rotation of the outer casing (42) in the first direction (1) generates a relative movement of the unscrewing projection (18, 27, 37, 47) with respect to the unscrewing surface (19, 26, 36, 46) so as to the outer casing (42) rotates freely with respect to the inner casing (44), - during the unscrewing configuration, a rotation of the outer casing (42) in the first direction (1) generates, by friction or by abutment of the unscrewing projection (18, 27, 37, 47) on the unscrewing surface (19, 26, 36, 46), a drive of the inner casing (44) in the first direction (1), so as to unscrew cap (16). 10. Tip (10) according to the preceding claim, wherein the cap (16) comprises biasing means (25, 35, 45) for separating the unscrewing projection (18, 27, 37, 47) and the surface of unscrewing (19, 26, 36, 46) when a pressing force exerted on the cap (16) has an intensity lower than the predetermined threshold or when no bearing force is exerted on the cap (16), the return means comprising for example a flexible tongue or a conical circular skirt projecting from the inner surface of the outer casing (42). The tip (10) of any preceding claim, wherein the cap (16) comprises a residual liquid absorbing pad (11) disposed proximate the liquid dispensing aperture (22). 12. Tip (10) according to any one of the preceding claims, wherein the cap (16) comprises a protuberance (48) intended to be in the immediate vicinity and facing the opening (22) when the cap (16). is mounted on the nozzle (10), this protuberance (48) having a form of expulsion (13) of the residual liquid, configured to discharge the residual liquid to the outside when the cap (16) is mounted on the tip (10). The mouthpiece (10) according to any one of the preceding claims, wherein the cap (16) has on the outside of the outer envelope (42) relief or visual means indicating to the user how to move from the security configuration at the unscrewing configuration. 14. Device (20) for dispensing liquid having a liquid dispensing nozzle mounted on a reservoir (12), characterized in that it comprises a nozzle (10) according to one of the preceding claims.